ASTM C821-09

Standard Specification for Lime for Use with Pozzolans

ABSTRACT
This specification covers all types of commercial hydrated lime such as: high-calcium, magnesium, or dolomitic-hydrated lime. This lime is used with pozzolans. The lime shall conform to the required physical and chemical limits: chemical factor, blaine fineness, and pozzolanic receptivity index. The following test methods shall be done: determination of calcium oxide, magnesium oxide, and carbon dioxide; calculation of chemical factor; blaine fineness; pozzolanic receptivity index; lime-pozzolan strength; and lime-pozzolan-aggregate strength and freeze-thaw resistance.
SCOPE
1.1 This specification covers all types of commercial hydrated lime such as: high-calcium, magnesium, or dolomitic-hydrated lime. By-product limes and slaked quick limes in dry, wet, or slurried form are also included.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Dec-1999
• ICS: 91.100.10 - Cement. Gypsum. Lime. Mortar
• Technical Committee: C07 - Lime and Limestone
• Drafting Committee: C07.02 - Specifications and Guidelines

Relations

• Replaces: ASTM C821-78(2000) - Standard Specification for Lime for Use with Pozzolans (Withdrawn 2009)
• Effective Date: 01-Jan-2000
• Referred By: ASTM E1266-20 - Standard Practice for Processing Mixtures of Lime, Fly Ash, and Heavy Metal Wastes in Structural Fills and Other Construction Applications
• Effective Date: 01-Jan-2000
• Referred By: ASTM C593-19 - Standard Specification for Fly Ash and Other Pozzolans for Use With Lime for Soil Stabilization
• Effective Date: 01-Jan-2000
• Referred By: ASTM C595/C595M-23 - Standard Specification for Blended Hydraulic Cements
• Effective Date: 01-Jan-2000

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:C821 −09
StandardSpecification for
1
Lime for Use with Pozzolans
This standard is issued under the fixed designation C821; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 3.2.1 chemical factor, n—a numerical value of the active
constituents in the hydrated lime that react chemically with a
1.1 This specification covers all types of commercial hy-
pozzolan. The value is based on the combined calcium oxide
drated lime such as: high-calcium, magnesium, or dolomitic-
equivalents of free calcium oxide, calcium hydroxide, and
hydrated lime. By-product limes and slaked quick limes in dry,
magnesium oxide. Calcium carbonate and magnesium hydrox-
wet, or slurried form are also included.
ideareexcluded,sincethesecompoundshavebeenfoundtobe
1.2 The values stated in inch-pound units are to be regarded
nonreactive.
as standard. The values given in parentheses are mathematical
3.2.2 pozzolanic receptivity index, n—a performance factor
conversions to SI units that are provided for information only
incorporating both chemical quality and fineness, determined
and are not considered standard.
by Eq 3.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4. Chemical and Physical Requirements
responsibility of the user of this standard to establish appro-
4.1 The lime shall conform to the requirements listed in
priate safety and health practices and determine the applica-
Table 1, except as noted in Section 5.
bility of regulatory limitations prior to use.
5. Performance Requirements
2. Referenced Documents
2
5.1 If the chemical factor, Blaine fineness, or pozzolanic
2.1 ASTM Standards:
receptivity index is below the limits given in Table 1, the lime
C25 Test Methods for Chemical Analysis of Limestone,
shall be required to meet the applicable performance require-
Quicklime, and Hydrated Lime
ments listed in Table 2. Where such lime complies with the
C50 Practice for Sampling, Sample Preparation, Packaging,
limitslistedinTable2,itshallbeconsideredacceptableforuse
and Marking of Lime and Limestone Products
with pozzolans. However, it may be necessary to increase the
C51 Terminology Relating to Lime and Limestone (as used
lime content in the lime-pozzolan mixtures in order to meet
by the Industry)
minimum design criteria.
C204 Test Methods for Fineness of Hydraulic Cement by
Air-Permeability Apparatus
6. Test Methods
C593 Specification for FlyAsh and Other Pozzolans for Use
With Lime for Soil Stabilization
6.1 Chemical Factor:
6.1.1 Determine calcium oxide (CaO), magnesium oxide
3. Terminology
(MgO), and carbon dioxide (CO ) contents in accordance with
2
3.1 Definitions:
Test Methods C25. When the magnesium oxide content is
3.1.1 Fordefinitionsoftermsusedinthisspecification,refer greater than 5 %, determine the peak height of magnesium
to Terminology C51.
oxide and magnesium hydroxide using standard X-ray diffrac-
tion procedures and calculate the ratio (r) of magnesium oxide
3.2 Definitions of Terms Specific to This Standard:
to hydroxide using Eq 1. When the magnesium oxide is less
than 5 %, the value of r shall be 0.30.
1
This specification is under the jurisdiction of ASTM Committee C07 on Lime
cps MgO
and Limestone and is the direct responsibility of Subcommittee C07.02 on
r 5 (1)
cps MgO12.0 cps Mg OH
~ ~ ! !
Specifications and Guidelines.
2
CurrenteditionapprovedJune1,2009.PublishedJuly2009.Originallyapproved
where:
in 1975. Last previous edition approved in 2000 as C821 – 78(2000). DOI:
10.1520/C0821-09.
cps = counts per second of principal peaks corresponding to
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
an interplanar spacing for MgO of 2.106 Å and for
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Mg(OH) of 2.365 Å.
Standards volume information, refer to the standard’s Document Summary page on 2
the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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C821−09
TABLE 1 Chemical and Physical Requirements
Test Method C204, and use this porosity (as well as specific
Chemical factor, min 50 gravity) in calculating the surface area.
2
Blaine fineness, min, cm /g 10 000
6.3 Pozzolanic Receptivity Index (PRI):
Pozzolanic receptivity index, min 100
chemical factor 3Blaine fineness
PRI 5 (3)
10 000
TABLE 2 Performance Requirements
6.4 Lime-Pozzolan Strength—See Specification C593, Sec-
Plastic C
...

This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:C821–78 (Reapproved 1995) Designation: C 821 – 09
Standard Specification for
1
Lime for Use with Pozzolans
This standard is issued under the fixed designation C 821; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This specification covers all types of commercial hydrated lime such as: high-calcium, magnesium, or dolomitic-hydrated
lime. By-product limes and slaked quick limes in dry, wet, or slurried form are also included.
1.2
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
C25 Test Methods for Chemical Analysis of Limestone, Quicklime, and Hydrated Lime
2
C50 PracticeforSampling,Inspection,Packing,andMarkingofLimeandLimestoneProducts PracticeforSampling,Sample
Preparation, Packaging, and Marking of Lime and Limestone Products
C51 Terminology Relating to Lime and Limestone (as used by the Industry)
C 204 Test Methods for Fineness of Hydraulic Cement by Air-Permeability Apparatus
C 593 Specification for Fly Ash and Other Pozzolans for Use withWith Lime for Soil Stabilization
3. Terminology
3.1Definitions:
3.1.1chemical factorTerminology
3.1 Definitions:
3.1.1 For definitions of terms used in this specification, refer to Terminology C 51.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 chemical factor, n—anumericalvalueoftheactiveconstituentsinthehydratedlimethatreactchemicallywithapozzolan.
The value is based on the combined calcium oxide equivalents of free calcium oxide, calcium hydroxide, and magnesium oxide.
Calcium carbonate and magnesium hydroxide are excluded, since these compounds have been found to be nonreactive.
3.1.2pozzolanic receptivity index
3.2.2 pozzolanic receptivity index, n—a performance factor incorporating both chemical quality and fineness, determined by Eq
3.
4. Chemical and Physical Requirements
4.1 The lime shall conform to the requirements listed in Table 1, except as noted in Section 5.
5. Performance Requirements
5.1 If the chemical factor, Blaine fineness, or pozzolanic receptivity index is below the limits given in Table 1, the lime shall
be required to meet the applicable performance requirements listed in Table 2. Where such lime complies with the limits listed in
Table 2, it shall be considered acceptable for use with pozzolans. However, it may be necessary to increase the lime content in the
1
This specification is under the jurisdiction of ASTM Committee C-7 on Lime, and is the direct responsibility of Subcommittee C07.07 on Pozzolanic Materials .
Current edition approved July 28, 1978. Published September 1978. Originally published as C821–75 T. Last previous edition C821–75 T.C07 on Lime and is the direct
responsibility of Subcommittee C07.02 on Specifications and Guidelines.
Current edition approved June 1, 2009. Published July 2009. Originally approved in 1975. Last previous edition approved in 2000 as C 821 – 78(2000).
2
Annual Book of ASTM Standards, Vol 04.01.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*ASummary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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C821–09
TABLE 1 Chemical and Physical Requirements
Chemical factor, min 50
2
Blaine fineness, min, cm /g 10 000
Pozzolanic receptivity index, min 100
TABLE 2 Performance Requirements
Plastic Compositions:
Lime-pozzolan strength, min, psi (MPa) 600 (4.13)
Nonplastic Compositions:
Lime-pozzolan-aggregate strength, min, psi (MPa) 400 (2.76)
Vacuum saturation strength, min, psi (MPa) 400 (2.8)
lime-pozzolan mixtures in order to meet minimum
...